EP 1521856 A1 20050413 - MARTENSITIC STAINLESS STEEL SEAMLESS PIPE AND A MANUFACTURING METHOD THEREOF
Title (en)
MARTENSITIC STAINLESS STEEL SEAMLESS PIPE AND A MANUFACTURING METHOD THEREOF
Title (de)
NAHTLOSES ROHR AUS MARTENSITISCHEM ROSTFREISTAHL UND VERFAHREN ZUM HERSTELLEN
Title (fr)
TUYAU SANS SOUDURE EN ACIER INOXYDABLE MARTENSITIQUE ET PROCEDE DE FABRICATION CORRESPONDANT
Publication
Application
Priority
- JP 0308625 W 20030707
- JP 2002206169 A 20020715
Abstract (en)
[origin: WO2004007780A1] The present invention provides a martensitic stainless steel seamless pipe, having no inner surface defect and suppressing a delayed fracture generation in the impact-worked portions, and a method for manufacturing such a seamless steel pipe. A martensitic stainless steel seamless pipe, characterized by consisting of C: 0.15 to 0.22%, Si: 0.1 to 1.0%, Mn: 0.10 to 1.00%, Cr: 12.00 to 14.00%, P: 0.020% or less, S: 0.010% or less, N: 0.05% or less, O(Oxygen): 0.0060% or less, at least one alloying element selected from V, Nb and Ti of 0.005 to 0.200 % and B of 0.0005 to 0.0100 %, and the balance Fe and impurities, satisfying either the following inequalities (1), (2), (4) and (5) or the following inequalities (1), (3), (4) and (5): C* + 10N* <= 0.45, (1) H1 <= -0.003(C* + 10N*) + 0.0016, (2) H2 <= -0.0018(C* + 10N*) + 0.00096, (3) Cr* <= 9.0, (4) S <= 0.088N* + 0.00056, (5).
IPC 1-7
C21D 9/08; C22C 38/18; C22C 38/32; C22C 38/24; C22C 38/26; C22C 38/28
IPC 8 full level
B21B 19/04 (2006.01); C21D 8/10 (2006.01); C22C 38/00 (2006.01); C22C 38/02 (2006.01); C22C 38/04 (2006.01); C22C 38/06 (2006.01); C22C 38/18 (2006.01); C22C 38/24 (2006.01); C22C 38/26 (2006.01); C22C 38/28 (2006.01); C22C 38/32 (2006.01); C22C 38/42 (2006.01); C22C 38/46 (2006.01); C22C 38/48 (2006.01); C22C 38/50 (2006.01); C22C 38/54 (2006.01)
CPC (source: EP)
C21D 8/105 (2013.01); C22C 38/001 (2013.01); C22C 38/002 (2013.01); C22C 38/02 (2013.01); C22C 38/04 (2013.01); C22C 38/06 (2013.01); C22C 38/18 (2013.01); C22C 38/24 (2013.01); C22C 38/26 (2013.01); C22C 38/28 (2013.01); C22C 38/32 (2013.01); C22C 38/42 (2013.01); C22C 38/46 (2013.01); C22C 38/48 (2013.01); C22C 38/50 (2013.01); C22C 38/54 (2013.01)
Citation (search report)
See references of WO 2004007780A1
Designated contracting state (EPC)
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PT RO SE SI SK TR
DOCDB simple family (publication)
WO 2004007780 A1 20040122; AR 040354 A1 20050330; AU 2003280989 A1 20040202; BR 0312612 A 20050419; CA 2491834 A1 20040122; CA 2491834 C 20100622; CN 100355914 C 20071219; CN 100532617 C 20090826; CN 101070579 A 20071114; CN 1668768 A 20050914; EP 1521856 A1 20050413; EP 1521856 B1 20130821; JP 2004043935 A 20040212; JP 4126979 B2 20080730; MX PA05000454 A 20050323; ZA 200500365 B 20050928
DOCDB simple family (application)
JP 0308625 W 20030707; AR P030102375 A 20030630; AU 2003280989 A 20030707; BR 0312612 A 20030707; CA 2491834 A 20030707; CN 03816735 A 20030707; CN 200710109933 A 20030707; EP 03741248 A 20030707; JP 2002206169 A 20020715; MX PA05000454 A 20030707; ZA 200500365 A 20050114